com.hp.hpl.jena.query.larq
Class IndexBuilderModel

java.lang.Object
  com.hp.hpl.jena.rdf.listeners.StatementListener
      com.hp.hpl.jena.query.larq.IndexBuilderModel

All Implemented Interfaces:

com.hp.hpl.jena.rdf.model.ModelChangedListener

Direct Known Subclasses:

IndexBuilderLiteral, IndexBuilderSubject

public abstract class IndexBuilderModel
extends com.hp.hpl.jena.rdf.listeners.StatementListener

Root class for index creation from a graph or model. This class can be used as a Model listener to index while loading data. It also provides the ability to index from a StmtIterator. Once completed, the index builder should be closed for writing, then the getIndex() called. To update the index once closed, the application should create a new index builder. Any index readers (e.g. IndexLARQ objects) need to be recreated and registered.

Author:

Andy Seaborne

Constructor Summary

IndexBuilderModel()
Create an in-memory index

IndexBuilderModel(java.io.File fileDir)
Create an on-disk index

IndexBuilderModel(org.apache.lucene.index.IndexWriter existingWriter)
Manage a Lucene index that has already been created

IndexBuilderModel(java.lang.String fileDir)
Create an on-disk index

Method Summary

void	addedStatement(com.hp.hpl.jena.rdf.model.Statement s) ModelListener interface : statement added to the model
void	closeWriter() Close the index - no more updates possible
void	flushWriter() Flush the index, optimizing it, to allow a reader to be created
IndexLARQ	getIndex() Get a search index used by LARQ.
abstract void	indexStatement(com.hp.hpl.jena.rdf.model.Statement s) Update index based on one statement
void	indexStatements(com.hp.hpl.jena.rdf.model.StmtIterator sIter) Index all the statements from a StmtIterator
void	removedStatement(com.hp.hpl.jena.rdf.model.Statement s) ModelListener interface : statement taken out of the model
void	unindexStatement(com.hp.hpl.jena.rdf.model.Statement s) Remove index information

Methods inherited from class com.hp.hpl.jena.rdf.listeners.StatementListener

addedStatements, addedStatements, addedStatements, addedStatements, notifyEvent, removedStatements, removedStatements, removedStatements, removedStatements

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

IndexBuilderModel

public IndexBuilderModel()

Create an in-memory index

IndexBuilderModel

public IndexBuilderModel(org.apache.lucene.index.IndexWriter existingWriter)

Manage a Lucene index that has already been created

IndexBuilderModel

public IndexBuilderModel(java.io.File fileDir)

Create an on-disk index

IndexBuilderModel

public IndexBuilderModel(java.lang.String fileDir)

Create an on-disk index

Method Detail

removedStatement

public void removedStatement(com.hp.hpl.jena.rdf.model.Statement s)

ModelListener interface : statement taken out of the model

Specified by:

removedStatement in interface com.hp.hpl.jena.rdf.model.ModelChangedListener

Overrides:

removedStatement in class com.hp.hpl.jena.rdf.listeners.StatementListener

unindexStatement

public void unindexStatement(com.hp.hpl.jena.rdf.model.Statement s)

Remove index information

addedStatement

public void addedStatement(com.hp.hpl.jena.rdf.model.Statement s)

ModelListener interface : statement added to the model

Specified by:

addedStatement in interface com.hp.hpl.jena.rdf.model.ModelChangedListener

Overrides:

addedStatement in class com.hp.hpl.jena.rdf.listeners.StatementListener

indexStatements

public void indexStatements(com.hp.hpl.jena.rdf.model.StmtIterator sIter)

Index all the statements from a StmtIterator

indexStatement

public abstract void indexStatement(com.hp.hpl.jena.rdf.model.Statement s)

Update index based on one statement

flushWriter

public void flushWriter()

Flush the index, optimizing it, to allow a reader to be created

closeWriter

public void closeWriter()

Close the index - no more updates possible

getIndex

public IndexLARQ getIndex()

Get a search index used by LARQ.